{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307440",
    "entityType": "User",
    "nonce": "0xc437bcdb11c9542f7533e38d23665c3ceb8a0c1be6839184e1e0ca8d8a5ac209",
    "signature": "0xac6ab816a0cfe83a4ee661ffb92d1bd050f1d3a6a2dab0c07a17667ca8819cdc156703d2fb66345254126e8cd139089db0e8106918ba3691b2b57ed4a74788421c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}